I thought my CTD problems had stemmed from MSFS update 5, but I am now clear that I was wrong

Hello strangers
I hope this is a good place to tell u all about my problem.
I didnt really play MFS2020 for like a month and about a week ago i tried to start it up again but it crashed right after the searching for updates screen. I just see the loading symbol and after that i can usually see the loading bar at the bottom for a few seconds. It starts in the center and moves just a bit before it sends me back to my desktop. The background music also stops after a few seconds. I have tried all the tips and also completly reinstalled windows but the game keeps on crashing.

My system has got the following specs
Ryzen 5 3600x
GTX 1080
16gb DDR4 ram
1tb m.2 nvme drive
1tb hdd
PSU: Coolermaster Thunder 700W

The PSU is about 7 years old.

If you have any ideas on how to fix this I would be very grateful